Heya Gemha, welcome to the forums, im newish myself... i know your pain i'm on it a few days now and have a severe throat infection i can barely swallow or talk.. don't think it was related to lipotrim but unfortunate all the same..
As for all your lovely questions... i'm not same weight as you i'm 16st 6lb and size 16ish so i can't compare weight loss and how fast etc.. but everyone loses weight different... on average you should lose between 4lb - 10lb first week again this can change theres people losing more than that first week and then on average you should lose between 3lb - 5 lb each week after that.. they are the figures i was told by my pharmacist, others could be different..
If you go by those estimates you can roughly figure out how long it will take and that of course is TFR 100% other wise expect lower figures...
As for the struggling bit, everyone is different, i come in here for motivation, i keep trying on clothes that are to small for me, or an outfit i want to fit into i leaving hanging where i can see it.. As for the not eating i make ice-cubes in different shapes and sit down to watch a movie in the evenings eating them.. it works for me as im chewing and adding to my water intake....
Hope some of that helps lol xxx